1. Department of Anesthesiology; Kaohsiung Taiwan
2. Faculty of Medicine, College of Medicine; Kaohsiung Medical University; Kaohsiung Taiwan
3. Department of Anesthesiology; Kaohsiung Medical University Hospital; Kaohsiung Taiwan
4. Division of Thyroid and Parathyroid Endocrine Surgery, Department of Otolaryngology, Massachusetts Eye and Ear Infirmary; Department of Otology and Laryngology, Harvard Medical School; Boston Massachusetts U.S.A.
5. Department of Otolaryngology-Head and Neck Surgery; Kaohsiung Medical University Hospital; Kaohsiung Taiwan
6. Department of Otorhinolaryngology; Kaohsiung Municipal Hsiao-Kang Hospital, Kaohsiung Medical University Hospital, Kaohsiung Medical University; Kaohsiung Taiwan